[oneMKL][RNG] Samples clean up for RNG, add new sample. (#159)

* [RNG] Add w/a for compiler namespace change and clean monte_carlo_european_opt sample

* [RNG] add new rng sample

* [RNG] add sample.json file

* [oneMKL][RNG] remove id from sample

* [oneMKL][RNG] Changed variables names in mc_european sample

Author: aelizaro

Libraries/oneMKL/monte_carlo_european_opt/README.md

@@ -52,12 +52,20 @@ If everything is working correctly, both buffer and USM versions of the program
 
 ```
 ./mc_european
+
+Monte Carlo European Option Pricing Simulation
+Buffer Api
+----------------------------------------------
 Number of options = 2048
 Number of samples = 262144
 put_abs_err  = 0.0372205
 call_abs_err = 0.0665814
 
 ./mc_european_usm
+
+Monte Carlo European Option Pricing Simulation
+Unified Shared Memory Api
+----------------------------------------------
 Number of options = 2048
 Number of samples = 262144
 put_abs_err  = 0.0372205